• International Journal of Highway Engineering
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• v.13 no.2
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• pp.21-29
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• 2011

Recently, typhoons or heavy rainfalls frequently occurred because of the effect of global warming, which caused serious damage such as landslide of mountain road, debris flow and uplift seepage pressure. Uplift seepage pressure induced on the pavement of mountain roads may cause serious pavement damage. It was known that subsurface drainage method is very effective to reduce uplift seepage pressure. Suitable permeability and stiffness of drainable base is very important to have the effectiveness of subsurface drainage. In this study, optimum particle size distribution of drainable base is investigate to meet the required permeability and bearing capacity of drainable base.

• 한국정보통신설비학회:학술대회논문집
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• 2007.08a
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• pp.306-309
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• 2007

지하구에는 국 가의 신경이라 할 수 있 는 전력, 통신, 상수도 등 주요시설물들이 수용되어 있으며, 지 하구는 화재, 집중호우에 의한 침수, 외부침입 등의 재난에 항상노출되어 있다. 2006년 12월에 발생된 구리 전력구 화재와 2000년 여의도 공동구 화재 등에서 보듯이 화재가 발생하면 화염과 연기, 유독가스로 인해 내부로 진입할 수 없으므로 조기경보 및 조기 대처가 매우 중요하다. 따라서 본 논문에서는 지하구 중에서 통신케이블을 수용하는 통신구의 재난에 조기 대처할 수 있는 통신구 원격감시 시스템에 대해 기술하고자 한다. 통신구 원격감시 시스템은 통신구내의 침입, 침수, 화재 등을 모니터링하여 재난을 미연에 방지할 수 있도록 하고, 각 감지기 및 장치에 설정된 임계치를 초과한 경우 경보 현황을 운용자에게 알려 신속하게 조치할 수 있도록 하였으며, 시스템의 안정성과 확장성, 유지보수의 용이성 등을 고려하여 통합/분산 서버, 데이터 수집장치, 감지기 등 으로 구성 하였고, 시스템간의 연동과 호환성을 위해 표준화된 통신 프로토콜을 사용하였으며, 필요에 따라 감지기 및 장치를 수정, 추가할 수 있도록 개발하였다. 그리고 이를 검증하기 위해 부산지역의 지하철병행통신구 3.8km에 대해 시범설치하여 운용함으로써 시스템의 안정성, 운용성 등에 대해 검증하였다.

• Journal of Korean Society for Geospatial Information Science
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• v.5 no.1 s.9
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• pp.129-137
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• 1997

According to the functions of city are getting more complicate and diverse, recently the concerns about underground space have been risen, and many infra-structures for social activities are now constructed under the ground. To maintain these kind of infra-structures effectively, it is necessary for concerned workers to access easily to the existing drawings and design information. and to modify the design drawings immediately o the changes of design value. And in the field of construction, immediate structural analysis and generation of design drawings will help to promote manufacturing ability, the quality of products, and the effectiveness of maintenance of design materials effectively.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.197-197
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• 2022

우리나라의 연 강수량은 약 70% 가 6월 ~ 9월 우기에 편중되어 있으며, 국내 약 65%가 산지로 이루어져 있어 강우의 유출이 한번에 일어나는 특성을 가지고 있다. 이러한 수문학적 특성으로 인하여 수자원 관리가 어려우며, 폭우, 폭염, 극한가뭄 등 기후변화 현상이 심화 되고 있는 것으로 나타나 수자원의 안정적인 관리에 대한 어려움이 있다. 특히, 강원도 영동지역을 포함한 동해안 지역에 위치하며, 경사가 가파른 태백산맥 동쪽은 하천 연장이 짧고 하천의 규모가 크지 않아 지속적인 수자원 부족 현상을 겪고 있다. 우리나라에서는 여름철 홍수기(6월 ~ 9월)에 집중된 강우와 일시에 유출되는 강우를 저장하기 위하여 저수지와 댐을 활용한 수자원 관리가 이루어지고 있다. 용수 부족으로 인한 주민 피해 및 사회적 갈등을 해결하기 위해서는 동해안 지역의 수자원 확보를 위한 구조적 대책 즉, 기존 댐 저수지 중심의 수자원 인프라를 지하댐을 중심으로 한 대용량 지하수 시설과 연계하여 활용하는 지하댐 적지 선정에 관한 연구를 시행하였으며, 적지선정에 대한 타당성을 위하여 전문가들의 설문조사를 통하여 Fuzzy AHP 기법을 적용하여 연구를 시행하였다.

• The Journal of the Convergence on Culture Technology
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• v.9 no.1
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• pp.679-684
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• 2023

Currently, large-scale and deep-depth excavation construction is being carried out in the vicinity of structures due to overdensity in urban areas in Korea. It is very important to secure the safety of retaining structures and underground structures for adjacent excavation work in urban areas. The safety of facilities is managed by introducing an automated measurement system. However, the utilization of the results of the automated measurement system is very low. Conventional evaluation techniques rely only on the maximum value of the measured data, and can overestimate abnormal behavior. In this study, we intend to improve the analysis technique for the automation measurement results. In order to identify abnormal behavior of facilities, a time-series analysis method for automated measurement data was presented. By applying a probability statistical analysis technique to a vast amount of data, highly reliable results were derived. In this study, the analysis method and evaluation method that can process the vast amount of data of facilities have been improved.

• Journal of Korean Society for Geospatial Information Science
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• v.17 no.1
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• pp.121-129
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• 2009

Today, it is difficult to re-use and share spatial information, because of the explosive growth of heterogeneous information and specific characters of spatial information accumulated by diverse local agency. A spatial analysis of subsurface spatial informa-tion, one of the National Spatial Data Infrastructure, needs related spatial information such as, topographical map, geologic map, underground facility map, etc. However, current methods using standard format or spatial datawarehouse cannot consider a se-mantic hetergenity. In this paper, the layered ontology model which consists of generic concept, measuremnt scale, spatial model, and subsurface spatial information has developed. Also, the current ontology building method pertained to human experts is a expensive and time-consuming process. We have developed the MDA-based metamodel(UML Profile) of ontology that can be a easy under-standing and flexiblity of environment change. The semantic quality of devleoped ontology model has evaluated by reasoning engine, Pellet. We expect to improve a semantic sharing, and strengthen capacities for developing GIS experts system using knowledge representation ability of ontology.

• Tunnel and Underground Space
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• v.15 no.3 s.56
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• pp.195-212
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• 2005

Surface subsidence which occurs with several reasons, such as collapse of gangway, discharge of groundwater, compaction of weak rock mass, and tunnel excavation in shallow depth, gives rise to a serious problem in national infra-structures. In this study, therefore, the mechanism of subsidence has been examined numerically to overcome the passive approach on subsidence occurrence area. With many kinds of numerical studies, the major geotechnical parameters have been selected and the weighted values have been defined for each parameters. Also the authors developed the numerical program which can estimate the possibility of subsidence occurrence, and proposed the decision method for objective and quantitative guideline. It is anticipated that this research will be helpful to establish the hazard map on subsidence region.

• Journal of the Korea Society of Computer and Information
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• v.26 no.2
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• pp.27-37
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• 2021

In this paper, we propose Automatic detection system of underground pipe which automatically detects underground pipe to help experts. Actual location of underground pipe does not match with blueprint due to various factors such as ground changes over time, construction discrepancies, etc. So, various accidents occur during excavation or just by ageing. Locating underground utilities is done through GPR exploration to prevent these accidents but there are shortage of experts, because GPR data is enormous and takes long time to analyze. In this paper, To analyze 3D GPR data automatically, we use 3D image segmentation, one of deep learning technique, and propose proper data generation algorithm. We also propose data augmentation technique and pre-processing module that are adequate to GPR data. In experiment results, we found the possibility for pipe analysis using image segmentation through our system recorded the performance of F1 score 40.4%.

• Journal of the Korean Association of Geographic Information Studies
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• v.23 no.4
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• pp.173-183
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• 2020

In the midst of the aging of underground facilities in urban areas and anxiety about road excavation safety accidents, the Ministry of Land, Infrastructure and Transport began to build Underground Geospatial Infomation Map from 2015 as part of the 「ground subsidence prevention measures」 and efficient use of underground spaces. So, the scope is spreading every year. The current Underground Geospatial Infomation Map information is web-based and is operated in a desktop environment, so it is true that there are some limitations in its use in a field environment such as an excavation construction site. The Underground Geospatial Infomation Map, built and operated in a web-based environment, is a large-scale 3D data. Therefore, in order to service by transmitting data to the field without delay, it is necessary to lighten the Underground Geospatial Infomation Map data. In addition, the current Underground Geospatial Infomation Map is not unified in data formats such as 3DS and COLLADA, and the coordinate system method is also different in relative coordinates and absolute coordinates. In this study, by analyzing domestic and overseas prior research and technical use cases, a mobile Underground Geospatial Infomation Map data format and a lightweight method were presented, and a technology development was conducted to create a mobile underground space integration map in the presented format. In addition, the weight reduction rate was tested by applying 3D data compression technology so that data can be transmitted quickly in the field, and technology was developed that can be used by decompressing 3D data compressed in the field. finally, it aims to supplement the technology experimentally developed in this study and conduct additional research to produce it as software that can be used in the excavation site and use it.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.11 no.2
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• pp.101-106
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• 1993

This study is a efficient management techniques of road by facility database. The purpose of road ledger investigate the property of road facility, the present condition of the location, the quality of the material of the ground and underground facility. Also, this is used to make plan for construction, and investment program of the road. To build road database, photogrammetry, ground control surveying and aerial photogrammetry must be performed. After the research of the road facility, a underground facility map and the road drawings are to be made. In this study, model area is the KUMJUNG-KU in Pusan where an industrial road is located on. There are about 7,000 signal lampes and traffic safety boards. It is possible to manage scientifical and efficient road ledger though statistical handling using facility database. In this paper, authors found the database of road facility through basic circumstances in the use of SML of ARC/INFO.